#!/bin/bash
#
# tvcap-script by Andreas Schalk, easycap.blogspot.com (Dec. 2011)
# This script is based an a template TV-script from Jose Catre-Vandis (Jan 2006).
# The ascii artwork is based on a template i found here: http://www.retrojunkie.com/asciiart/electron/tv.txt
# Contact: [email protected]
#-----------------------------------------------------------------------------
#
# FUNCTION: This script provides Zenity menues for viewing an capturing video with a tv-card on Linux.
#
# Supported programs: MPlayer, MEncoder, VLC, Tvtime, Cheese und Sox
#
#-----------------------------------------------------------------------------
#
# Basic options:
#
# Change the following parameters for viewing/ capturing according to your needs
#
#-----------------------------------------------------------------------------
VERBOSE=1 # if '0', this script does not show messages window and does not ask for norm and input number anymore
NORM="PAL" # preselect tv norm 'PAL' or 'NTSC'
INPUT_NR=0 # preselect input number of your easycap where video source is plugged in
input_width=720 # preselect width an height of video source (mplayer, vlc, mencoder)
input_height=576 # other possible combinations: 640/480; 320/240
ASPECT=169 # '169' (16:9) or '43' (4:3); this value affects video playback with mplayer or vlc only!
FREQ="48000" # on soundproblems reduce audio frequency (44100 oder 32000 oder 8000)
TV_INPUT="no" # if 'yes' the analogue antenna input of the tv-card will be used (mplayer only)
CHAN="chanlist=europe-west:channel=60" # channel setting (nur mplayer/ mencoder) the analogue antenna input of the tv-card is used
NORM="PAL" # preselect TV-norm 'PAL' oder 'NTSC'
INPUT_NR=1 # preselct the Input on the TV-card, where the videosource is plugged in ('0' normally is the antenna, '1' the first CVBS ...
#-----------------------------------------------------------------------------
MESSAGE=()
R_MESSAGE=()
EXITCODE=0
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# test videodevices
##-----------------------------------------------------------------------------
declare -a VIDEO_DEV
VIDEO_DEV=( TRUE none
FALSE none
FALSE none
FALSE none
)
i1=0;
i2=0;
while `test -e "/dev/video${i1}"`; do
VIDEO_DEV[$i2+1]="/dev/video${i1}";
i1=$[$i1+1];
i2=$[$i2+2];
done
if [ "xnone" = "x${VIDEO_DEV[1]}" ]; then
zenity --error --timeout=5 --text "Cannot find /dev/video0!\n Script ends in 5 seconds" --title "No videodevice!";
exit 1;
fi
if [ "x${VIDEO_DEV[$i2+1]}" = "xnone" ]; then
VIDEO_DEV[$i2]="" && VIDEO_DEV[$i2+1]="" && VIDEO_DEV[$i2+2]="" && VIDEO_DEV[$i2+3]="" && VIDEO_DEV[$i2+4]="" && VIDEO_DEV[$i2+5]="";
fi
DEV_VIDEO=$(zenity --list --text "Select videodevice" --radiolist --column "Choice" --column "Device" ${VIDEO_DEV[@]}) || exit 0
if [ ${VERBOSE} = 1 ]; then
#-----------------------------------------------------------------------------
# select TV norm
#-----------------------------------------------------------------------------
title="Select tv norm"
NORM=`zenity --title="$title" --list --radiolist --column="Choice" \
--column="Norm" --column="Description" \
TRUE "PAL" "PAL Norm" \
FALSE "NTSC" "NTSC Norm" \
` || exit 0
fi
#-----------------------------------------------------------------------------
# select Input number
#-----------------------------------------------------------------------------
title="Select Input NR"
INPUT_NR=`zenity --title="$title" --list --radiolist --column="Choice" \
--column="Input NR" --column="Description" \
TRUE "0" "Input 1 (TV)" \
FALSE "1" "Input 2" \
FALSE "2" "Input 3" \
FALSE "3" "Input 4" \
FALSE "4" "Input 5" \
FALSE "5" "Input 6"
` || exit 0
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Check if snd_usb_audio module is loaded
#-----------------------------------------------------------------------------
SND_USB=`lsmod | grep snd_usb_audio | wc -l`
if [ "${SND_USB}" -ge "1" ]; then
# MESSAGE=("${MESSAGE[@]}" "\nNOTE: snd_usb_audio module was loaded and may conflict with your USB capture device")
zenity --info --text "NOTE: The snd_usb_audio module was loaded\nand may conflict with your USB capture device.\n \nIf sound problems appear,\nplug out your USB capturedevice and run\n rmmod snd_usb_audio \nas root in the terminal!" --title "Snd_usb_audio module loaded!"
fi
#-----------------------------------------------------------------------------
# test and select soundcard
#-----------------------------------------------------------------------------
if `test ! -e /dev/dsp` && [ -z "`ls -1 /proc/asound`" ]; then
if_audio="no";
echo "No soundcard detected";
MESSAGE=("${MESSAGE[@]}" "Note: No soundcard can be found!\nSound is not supported.\n");
else
if_audio="yes"
declare -a SOUND_DEV
SOUND_DEV=( FALSE /dev/dsp OSS
FALSE card1 ALSA
TRUE card2 ALSA
FALSE card3 ALSA
)
test ! -e /dev/dsp && echo "No dsp" && SOUND_DEV[0]="" && SOUND_DEV[1]="" && SOUND_DEV[2]=""
ALSA_CARD=$(cat /proc/asound/cards | cut -d":" -f1 -s)
declare -a ALSA_CARDS
ALSA_CARDS=(${ALSA_CARD})
i5=1
for P in ${ALSA_CARDS[@]}; do
ALSA_NAME=$(echo ${ALSA_CARDS[$i5]} | tr -d [=[=] );
SOUND_DEV[$i5+3]=$ALSA_NAME
if [ "x${ALSA_NAME}" = "x" ]; then
SOUND_DEV[$i5+2]="" && SOUND_DEV[$i5+3]="" && SOUND_DEV[$i5+4]=""
fi
i5=$[$i5+3];
done
fi
DEV_AUDIO=$(zenity --list --text "Select soundcard" --radiolist --column "Choice" --column "Device" --column "Type" ${SOUND_DEV[@]}) || exit 0
if [ $DEV_AUDIO = "/dev/dsp" ]; then
AUDIO_TYPE="oss"
else
AUDIO_TYPE="alsa"
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# test, if devicenodes are read- and writable for unprivileged users
#-----------------------------------------------------------------------------
if [ -r ${DEV_VIDEO} ] && [ -w ${DEV_VIDEO} ]; then
MESSAGE=("${MESSAGE[@]}" "\nSUCCESS! ${DEV_VIDEO} is read- and writable!\n")
elif [ -e ${DEV_VIDEO} ]; then
zenity --info --text "Cannot access ${DEV_VIDEO}!\nRun 'sudo chmod a+rw ${DEV_VIDEO}'\nin the terminal!" --title "Message"
EXITCODE=1
fi
if [ -r ${DEV_AUDIO} ] && [ -w ${DEV_AUDIO} ]; then
MESSAGE=("${MESSAGE[@]}" "\nSUCCESS! ${DEV_AUDIO} is read- and writable!")
elif [ -e ${DEV_AUDIO} ]; then
zenity --info --text "\nCannot access ${DEV_AUDIO}!\nRun 'sudo chmod a+rw ${DEV_AUDIO}'\nin the terminal!" --title "Message"
MESSAGE=("${MESSAGE[@]}" "\n\nCannot access ${DEV_AUDIO}!\nRun 'sudo chmod a+rw ${DEV_AUDIO}'\nin the terminal!!")
if_audio="no"
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# find executable programs
#-----------------------------------------------------------------------------
PROG_LIST=( TRUE vlc #
FALSE mplayer #
FALSE cheese #
FALSE tvtime #
FALSE mencoder #
FALSE sox #
)
PROGS=(vlc mplayer cheese tvtime mencoder sox)
i4=0
for P in ${PROGS[@]}; do
PROG=`which $P`
if [ "x" = "x${PROG}" ] || [ ! -x ${PROG} ]; then
echo "Cannot find or execute $P. Is t installed?"
MESSAGE=("${MESSAGE[@]}" "\nCannot find or execute $P. Is it installed?")
PROG_LIST[$i4]=""
PROG_LIST[$i4+1]=""
if [ "${PROG_LIST[11]}" = "" ]; then
echo "Sox is needed for sound with tvtime!"
MESSAGE=("${MESSAGE[@]}" "\nSox is needed for sound with tvtime!")
fi
fi
i4=$i4+2
done
PROG_LIST[10]="" # Sox does not show up on list
PROG_LIST[11]="" #
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# messages are displayed and script ends
#-----------------------------------------------------------------------------
if [ ${EXITCODE} = 1 ]; then
MESSAGE=("${MESSAGE[@]}" "\nScript ends")
fi
echo ${MESSAGE[*]}
#########################
if [ ${VERBOSE} = 1 ]; then
zenity --height="50" --info --text "${MESSAGE[*]}" --title "Messages"
fi
if [ ${EXITCODE} = 1 ]; then
exit 1
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# create logfile
#-----------------------------------------------------------------------------
LOGFILE="./test`echo "${DEV_VIDEO}" | sed -e "s,/dev/,," - `.log"
# echo "Log file is: ${LOGFILE}"
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# zenity list - program choice
#-----------------------------------------------------------------------------
view_cap=$(zenity --list --width=250 --height=400 --text " ___________\n | .----------. o|\n | | Easy | o|\n | | CAP_ | o|\n |_\`-----------´ _|\n ´\` ´\`\\nTv-norm: $NORM Input-Nr:$INPUT_NR\nVideodevice: $DEV_VIDEO $input_width x $input_height \nAudiodevice: $AUDIO_TYPE $DEV_AUDIO $FREQ Hz\nIs audio on? $if_audio\nLogfile: $LOGFILE " --radiolist --column "Choice" --column "program" ${PROG_LIST[@]}) || exit 0
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# mplayer command
#-----------------------------------------------------------------------------
if [ "alsa" = "${AUDIO_TYPE}" ]; then
M_AUDIO="buffersize=16:alsa:amode=1:forcechan=2:audiorate=${FREQ}:adevice=plughw.${DEV_AUDIO}"
elif [ "oss" = "${AUDIO_TYPE}" ]; then
M_AUDIO="adevice=${DEV_AUDIO}"
fi
if [ "$NORM" = "PAL" ]; then
fps_count=25
else
fps_count=30
fi
if [ "$ASPECT" = 169 ]; then
M_ASPECT="-aspect 1.78"
# elif [ "$ASPECT" = 43 ]; then
# M_ASPECT="-aspect 1"
else
M_ASPECT=""
fi
if [ "yes" = "${TV_INPUT}" ]; then
M_VIDEO="${CHAN}"
elif [ "no" = "${TV_INPUT}" ]; then
M_VIDEO="norm=${NORM}:width=${input_width}:height=${input_height}:outfmt=uyvy:device=${DEV_VIDEO}:input=${INPUT_NR}:fps=${fps_count}"
fi
#echo $M_VIDEO
#echo $M_AUDIO
#echo $view_cap
if [ "mplayer" = "${view_cap}" ]; then
if [ "$if_audio" = "yes" ]; then
1>${LOGFILE} 2>&1 \
mplayer tv:// -tv driver=v4l2:${M_VIDEO}:${M_AUDIO}:forceaudio:immediatemode=0 -hardframedrop ${M_ASPECT} -ao sdl, ${AUDIO_TYPE} -msglevel all=9
elif [ "$if_audio" = "no" ]; then
1>${LOGFILE} 2>&1 \
mplayer tv:// -tv driver=v4l2:${M_VIDEO} -hardframedrop ${M_ASPECT} -msglevel all=9 -nosound
fi
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# vlc command
#-----------------------------------------------------------------------------
if [ "vlc" = "${view_cap}" ]; then
if [ "alsa" = "${AUDIO_TYPE}" ]; then
V_AUDIO="//plughw:${DEV_AUDIO}"
elif [ "oss" = "${AUDIO_TYPE}" ]; then
V_AUDIO="//${DEV_AUDIO}"
fi
if [ "$NORM" = "PAL" ]; then
V_NORM="pal"
elif [ "$NORM" = "NTSC" ]; then
V_NORM="ntsc"
fi
if [ "$ASPECT" = 169 ]; then
V_ASPECT="--aspect-ratio=16:9"
elif [ "$ASPECT" = 43 ]; then
V_ASPECT="--aspect-ratio=4:3"
else
V_ASPECT=""
fi
1>${LOGFILE} 2>&1 \
vlc -vvv v4l2://${DEV_VIDEO}:input=${INPUT_NR}:width=$input_width:height=$input_height:norm=${V_NORM} ${V_ASPECT} :input-slave=${AUDIO_TYPE}:${V_AUDIO} --demux rawvideo
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# tvtime command
#-----------------------------------------------------------------------------
if [ "tvtime" = "${view_cap}" ]; then
if [ "alsa" = "${AUDIO_TYPE}" ]; then
T_AUDIO="-t alsa plughw:${DEV_AUDIO} -s2 -c 2 -r ${FREQ} -s2 -t alsa default"
elif [ "oss" = "${AUDIO_TYPE}" ]; then
T_AUDIO="-t raw -s2 ${DEV_AUDIO} -c 2 -r ${FREQ} -s2 -t ossdsp /dev/dsp"
fi
echo $T_AUDIO
1>${LOGFILE} 2>&1 \
>./tvtime.err
(tvtime -d ${DEV_VIDEO} -i 0 -n "${NORM}" 1>/dev/null 2>>./tvtime.err) &
rc=1
while [ 0 -ne ${rc} ];
do
tvtime-command run_command "(sox -c 2 -r ${FREQ} ${T_AUDIO} 1>/dev/null 2>>./tvtime.err)" 1>/dev/null 2>>./tvtime.err
rc=$?
if [ 0 -eq ${rc} ]; then break; fi
sleep 0.5
done
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# cheese command
#-----------------------------------------------------------------------------
if [ "cheese" = "${view_cap}" ]; then
1>${LOGFILE} 2>&1 \
cheese
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# mencoder command - recording section
#-----------------------------------------------------------------------------
if [ "mencoder" = "${view_cap}" ]; then
#Auswahl des Seitenverhältnisses der Aufnahme?
title="Chose aspect of your target file!"
aspect_type=`zenity --width="400" --height="220" --title="$title" --list --radiolist --column="Click Here" \
--column="choice" --column="source >> target" \
TRUE "1" "4:3 > 4:3"\
FALSE "2" "4:3 > scale=16:9" \
FALSE "3" "4:3 > crop borders=16:9" \
` || exit 0
if [ "$aspect_type" = "1" ]; then
crop_scale="scale=640:480"
elif [ "$aspect_type" = "2" ]; then
crop_scale="scale=720:406"
elif [ "$aspect_type" = "3" ]; then
crop_scale="crop=720:406:0:72"
fi
#################################################################################
#Quality?
title="What quality do you want to record at ?"
qual_type=`zenity --width="380" --height="380" --title="$title" --list --radiolist --column="Click Here" \
--column="Record Time" --column="Description" \
FALSE "500" "Passable Quality"\
FALSE "900" "OK Quality"\
FALSE "1100" "VHS Quality"\
TRUE "1300" "SVHS Quality"\
FALSE "1500" "VCD Quality"\
FALSE "1800" "SVCD Quality" \
FALSE "2000" "Very Good Quality"\
FALSE "2500" "High Quality" \
FALSE "3000" "Excellent Quality"\
` || exit 0
##################################################################################
#How Long?
title="How long do you want to record for ?"
time_type=`zenity --width="380" --height="500" --title="$title" --list --radiolist --column="Click Here" \
--column="Record Time" --column="Description" \
FALSE "00:00:00" "unlimited"\
TRUE "00:00:30" "30 seconds for testing"\
FALSE "00:10:00" "0.2 hours"\
FALSE "00:30:00" "0.5 hours"\
FALSE "00:45:00" "0.75 hours"\
FALSE "01:00:00" "1 hour"\
FALSE "01:15:00" "1.25 hours"\
FALSE "01:30:00" "1.5 hours" \
FALSE "01:45:00" "1.75 hours"\
FALSE "02:00:00" "2 hours" \
FALSE "02:15:00" "2.25 hours"\
FALSE "02:30:00" "2.5 hours" \
FALSE "02:45:00" "2.75 hours"\
FALSE "03:00:00" "3 hours" \
FALSE "03:15:00" "3.25 hours" \
FALSE "03:30:00" "3.5 hours" \
` || exit 0
#M_TIME="-endpos $time_type"
#################################################################################
#user must enter a filename
filedate=$(date +%F_%H:%M-%S)
title="Please enter a filename for your recording, no spaces"
file_name=`zenity --width="480" --height="150" --title="$title" --file-selection --save --confirm-overwrite --filename="tvcap_$filedate"` || exit 0
###########################################################################################
# summary
R_MESSAGE=("${R_MESSAGE[@]}" "\nRecording options:")
R_MESSAGE=("${R_MESSAGE[@]}" "\nRecording audio: $if_audio")
R_MESSAGE=("${R_MESSAGE[@]}" "\nRecording from Input $INPUT_NR - Norm: $NORM $fps_count fps")
R_MESSAGE=("${R_MESSAGE[@]}" "\nCrop and scale options: $crop_scale")
R_MESSAGE=("${R_MESSAGE[@]}" "\nEncoding quality: $qual_type kb/s")
R_MESSAGE=("${R_MESSAGE[@]}" "\nRecording time:$time_type hours")
R_MESSAGE=("${R_MESSAGE[@]}" "\nFile name: $file_name.avi ")
echo ${R_MESSAGE[*]}
if [ ${VERBOSE} = 1 ]; then
zenity --info --text "${R_MESSAGE[*]}" --title "Recording options"
fi
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# mencoder line
#-----------------------------------------------------------------------------
if [ "$if_audio" = "yes" ]; then
zenity --info --title="Start recording with audio" --text="Press OK to start."
mencoder tv:// -tv driver=v4l2:norm=$NORM:width=$input_width:height=$input_height:outfmt=uyvy:device=${DEV_VIDEO}:input=${INPUT_NR}:fps=$fps_count:${M_AUDIO}:forceaudio:immediatemode=0 -msglevel all=9 -ovc lavc -ffourcc DX50 -lavcopts vcodec=mpeg4:mbd=2:turbo:vbitrate=$qual_type:keyint=15 -vf pp=lb,$crop_scale -oac mp3lame -endpos $time_type -o $file_name.avi | tee ${LOGFILE} | zenity --progress --pulsate --auto-close --auto-kill --text="Processing Video - length: $time_type H:M:S"
zenity --info --title="Job complete" --text="The recording is now complete."
elif [ "$if_audio" = "no" ]; then
zenity --info --title="Start recording without audio" --text="Press ok to start recording"
1>${LOGFILE} 2>&1 \
mencoder tv:// -tv driver=v4l2:norm=$NORM:width=$input_width:height=$input_height:outfmt=uyvy:device=${DEV_VIDEO}:input=${INPUT_NR}:fps=$fps_count -msglevel all=9 -nosound -ovc lavc -ffourcc DX50 -lavcopts vcodec=mpeg4:mbd=2:turbo:vbitrate=$qual_type:keyint=15 -vf pp=lb,$crop_scale -endpos $time_type -o $file_name.avi | tee ${LOGFILE} | zenity --progress --pulsate --auto-close --auto-kill --text="Processing Video - length: $time_type H:M:S"
zenity --info --title="Job complete" --text="The recording is now complete."
fi
fi
exit 1
Simply copy/paste all this code in a file called tvcap-script.sh, give the execution permissions and run it in a terminal. The process is quite easy and I am going to explain as follows:
1.- After pressing Enter, you will be asked for the capture source, and dependind on the device's location (tested before), you can have -as in my case- several video sources, I am using the /dev/video2 for this example, which refers to my USB TV Tuner. Note that this screenshot didn't get the window decorator but the options and the "OK" button can be seen right there.
2.- Now we need to define the norm, in Mexico we use NTSC, and unless you wish to capture your video using a different norm with square aspect ratio you should not use PAL, which can indeed harm a bit your video quality. It also depends on where you live and the norm of your country.
3.- My TV Tuner is having several inputs, yours can have a different amount of inputs, check it out and run as many tests as you need to determine which one is the best for your capture. I am going to use the one that refers to TV. (Input 1 (TV))
4.- Next, you may (or not) be warned and offered for a solution if something goes wrong during the sound capture (both audio and video are going to be captured at once but if your snd_usb_audio module has already been loaded it may crash the audio capture and thus the video capture itself)
5.- My TV Tuner features support for several audio inputs, which includes the integration with the embedded sound device in my motherboard (via connecting a cable to the aux-line and controlled by sound mixer), you check which one is the best for you and remember that the defaults are usually marked as the "best for you".
6.- If everything is going fine, you will see a small window with a message that reads something like this:
"SUCCESS! /dev/video2 is read- and writable!"
click "OK" to continue.
7.- After that, you can choose from the list of recording options available on your system. I have installed what you can see in the next screenshot. Anyone is valid and the quality doesn't reflect major changes but I personally prefer mencoder. If you don't have any of these installed you should install it in order to run your tests.
8.- After you have chosen your encoding software preference (in the previous step) you will be asked for the aspect ratio. If you don't have experience on this just leave it as is. It normally defaults to which better fits your TV Tuner signal.
9.- Based on your choice related to the aspect ratio, you will have several options for the video quality, also based on bitrate, the description in the next window is very specific. Remember that: the higher bitrate (best quality) the video file size can become a huge amount.
10.- After that, we need just to choose how long will our video capture be. There are several presets, I have chosen "30 seconds for testing" in this example but you can choose any or even choose "unlimited" in order to you decide when to stop the recording.
11.- Next, you will be asked for a file name, giving one by default, which you can change in this screen.
12.- You will be prompted to check your "Recording options" in the next screen, just click "OK".
13.- Just one more click to start.
14.- When recording, the terminal may show some activity, and a small window like this:
15.- At the end of the process, you will receive a confirmation window.
And... that's it...
You can cancel the recording or the process itself by pressing ESC at any moment, there will be no changes at all.
At the end of the recording, you will have the video in the place that you choose in the step 11, in companion with a log file with a name like: "testvideo0.log" or something like that.
This is the easiest way to encode from RF Signal TV Tuners, gathering both audio and video in the same file.
I have another process which is achieved using a python process which features a GUI in which you can handle several useful things, like changing the channel, run pre-recording tests and even record but sometimes it drops me failures. If you wish it please let me know how can I reach you. I don't want to write parchments or a bible... LOL!
本回答来自：Record from VHS Tapes in AskUbuntu.com
使用此过程，您可以在电视调谐器 PCI/USB 卡中直接捕获进入计算机的任何内容，并且它提供对 PAL 和/或 NTSC 格式的支持。
祝你好运！
抱歉，这会很长。
首先，我们需要了解射频电视调谐器本身会同时解码音频和视频。如果它似乎没有“声音”，可能是因为您的声音设备没有从电视调谐器获得任何声音信号，在大多数情况下，这是通过将正确的电缆插入正确的位置来实现的，通常是辅助线路，这样您就可以在混音器中控制电视调谐器的音量。
我建议你看看这个答案，我在其中解释了如何通过在终端中删除 next 来将音频定向到声音设备：
您需要安装tvtime (
sudo apt-get install tvtime) 才能使测试正常运行。如果 tvtime 没有从您的电视调谐器获得任何信号，那么我们需要确保该软件正在从正确的设备收集正确的数据。让我们在终端中查询，让我们看到有多少设备连接到您的计算机，可用于收集图像，在终端中使用此命令：
结果应该是这样的：
就我而言，我有 3 个视频设备，其中一个是 USB 电视调谐器，我用它来观看/录制直播电视节目/VTR/VCR/RF-DVD/视频转换器和其他 RF 信号。
您应该检查其中任何一个并记下您的结果以便继续。
如果您对信号感到满意，可以使用Andreas Schalk 的 tvcap-script录制音频和视频，为了方便起见，我将代码放在这里：
Simply copy/paste all this code in a file called tvcap-script.sh, give the execution permissions and run it in a terminal. The process is quite easy and I am going to explain as follows:
1.- After pressing Enter, you will be asked for the capture source, and dependind on the device's location (tested before), you can have -as in my case- several video sources, I am using the /dev/video2 for this example, which refers to my USB TV Tuner. Note that this screenshot didn't get the window decorator but the options and the "OK" button can be seen right there.
2.- Now we need to define the norm, in Mexico we use NTSC, and unless you wish to capture your video using a different norm with square aspect ratio you should not use PAL, which can indeed harm a bit your video quality. It also depends on where you live and the norm of your country.
3.- My TV Tuner is having several inputs, yours can have a different amount of inputs, check it out and run as many tests as you need to determine which one is the best for your capture. I am going to use the one that refers to TV. (Input 1 (TV))
4.- Next, you may (or not) be warned and offered for a solution if something goes wrong during the sound capture (both audio and video are going to be captured at once but if your snd_usb_audio module has already been loaded it may crash the audio capture and thus the video capture itself)
5.- My TV Tuner features support for several audio inputs, which includes the integration with the embedded sound device in my motherboard (via connecting a cable to the aux-line and controlled by sound mixer), you check which one is the best for you and remember that the defaults are usually marked as the "best for you".
6.- If everything is going fine, you will see a small window with a message that reads something like this:
click "OK" to continue.
7.- After that, you can choose from the list of recording options available on your system. I have installed what you can see in the next screenshot. Anyone is valid and the quality doesn't reflect major changes but I personally prefer mencoder. If you don't have any of these installed you should install it in order to run your tests.
8.- After you have chosen your encoding software preference (in the previous step) you will be asked for the aspect ratio. If you don't have experience on this just leave it as is. It normally defaults to which better fits your TV Tuner signal.
9.- Based on your choice related to the aspect ratio, you will have several options for the video quality, also based on bitrate, the description in the next window is very specific. Remember that: the higher bitrate (best quality) the video file size can become a huge amount.
10.- After that, we need just to choose how long will our video capture be. There are several presets, I have chosen "30 seconds for testing" in this example but you can choose any or even choose "unlimited" in order to you decide when to stop the recording.
11.- Next, you will be asked for a file name, giving one by default, which you can change in this screen.
12.- You will be prompted to check your "Recording options" in the next screen, just click "OK".
13.- Just one more click to start.
14.- When recording, the terminal may show some activity, and a small window like this:
15.- At the end of the process, you will receive a confirmation window.
And... that's it...
You can cancel the recording or the process itself by pressing ESC at any moment, there will be no changes at all.
At the end of the recording, you will have the video in the place that you choose in the step 11, in companion with a log file with a name like: "testvideo0.log" or something like that.
This is the easiest way to encode from RF Signal TV Tuners, gathering both audio and video in the same file.
I have another process which is achieved using a python process which features a GUI in which you can handle several useful things, like changing the channel, run pre-recording tests and even record but sometimes it drops me failures. If you wish it please let me know how can I reach you. I don't want to write parchments or a bible... LOL!
Good luck!